72V 50Ah / 58Ah IP68 Waterproof Li-ion Battery Pack for Electric Surfboard — OEM/ODM Factory Direct
- Configurations: 72V 50Ah (3,600Wh) / 72V 58Ah (4,176Wh) — two capacity options, same platform
- Cell: 26650 cylindrical NCM, automotive-grade — 800 cycles @80% DOD
- Peak Discharge: 200A continuous — supports 10–15kW motor systems
- Waterproof: IP68 certified, tested to 20m continuous submersion
- BMS: Japanese-IC, 6-point protection — OC / OD / OT / SC / cell balance
- Underwater Hot Swap: Supported — magnetic switch + T-handle, no board removal needed
- OEM/ODM: Voltage, capacity, connector, enclosure & IP rating fully customizable
- MOQ : 5 units (standard) / 10 units (OEM custom) — samples ready in 5–7 business days
Description du produit
The BLD-72V-IP68-ESB series is a purpose-built lithium-ion battery pack for performance-grade electric surfboards operating in open-water environments. Available in two configurations — 72V 50Ah (3,600Wh) and 72V 58Ah (4,176Wh) — both packs are built on 26650 cylindrical NCM cells and deliver sustained 200A discharge output to support 10–15kW motor systems without thermal throttling or voltage sag under full load.
The IP68-rated enclosure is tested for continuous submersion at 20 meters, with dual-layer silicone gaskets, pressure-sealed T-handle, and a magnetic switch that functions reliably in saltwater without corrosion. The 26650 NCM cell format is selected specifically for its higher energy density over 18650 at equivalent discharge rates — a requirement for compact marine enclosures where volume is fixed but runtime expectations are high.
Compatible surfboard and motor system references:
| Platform / Motor System | Tension nominale | Compatibility Notes |
|---|---|---|
| AdmitJet ST-ES12KW | 72V | Direct voltage match, 12kW motor |
| Lampuga / Lampuga Air | 72V | Connector & BMS current verified |
| Lift eFoil (High-Power) | 72V | Custom connector available via OEM |
| Waydoo Flyer EVO Series | 72V | CAN bus BMS integration available |
| Generic 10–15kW PWM ESC Systems | 72V | XT90 / Anderson connector options |
All compatibility data is pre-sales reference. Connector pin-out and BMS protocol must be confirmed before bulk order. Sample units per your spec are available within 7 business days.
Paramètres techniques
| Paramètre | 72V 50Ah (Standard) | 72V 58Ah (High Capacity) |
|---|---|---|
| Numéro de modèle. | BLD-72V50A-IP68-ESB | BLD-72V58A-IP68-ESB |
| Tension nominale | 72V | 72V |
| Capacité nominale | 50Ah (3,600Wh) | 58Ah (4,176Wh) |
| Chimie cellulaire | NCM (Nickel Manganese Cobalt) | NCM (Nickel Manganese Cobalt) |
| Cell Size | 26650 Cylindrical | 26650 Cylindrical |
| Full Charge Voltage | 84.0V | 84.0V |
| Cutoff Voltage | 60.0V | 60.0V |
| Cont. Discharge | 200A | 200A |
| Cycle de vie | ≥800 cycles @80% DOD | ≥800 cycles @80% DOD |
| Waterproof Rating | IP68 (20m continuous) | IP68 (20m continuous) |
| Dimensions | 375 × 255 × 118 mm | 375 × 255 × 130 mm (confirm with sample) |
| Poids | 6.5 kg (14.33 lb) | ~7.4 kg (confirm with sample) |
| Température de fonctionnement. | -20°C à +60°C | -20°C à +60°C |
| Protection du système de gestion technique du bâtiment | OC / OD / OT / SC / Cell Balance | OC / OD / OT / SC / Cell Balance |
| BMS IC | Japanese IC (confirm brand) | TOP Japanese IC |
| Certifications | UN38.3, CE, RoHS | UN38.3, CE, RoHS |
| OEM/ODM | Supported | Supported |
| Garantie | 12 mois | 12 mois |
| Package Size | 57 × 36 × 14 cm | 57 × 36 × 16 cm (est.) |
| Lieu d'origine | Guangdong, Chine | Guangdong, Chine |
Caractéristiques et avantages
⚡ 200A Continuous Discharge — Built for 10–15kW Motor Systems
At 72V nominal, 200A continuous output equals 14.4kW sustained power delivery. The 26650 NCM cells are specified for high-rate discharge without accelerated degradation — the BMS fuse threshold sits at 220A, giving motor systems full headroom under peak throttle without tripping protection. No derating at sea temperature.
🌊 IP68 to 20 Meters — Tested, Not Rated-on-Paper
IP68 means continuous submersion beyond 1 meter. This pack is verified to 20m. The enclosure uses dual-layer silicone gaskets with torque-controlled fasteners verified per IEC 60529. The magnetic switch and T-handle maintain watertight integrity under repeated thermal cycling between cold seawater and air — a real-world stress that cheaper IP65 housings fail in under 30 days of salt exposure.
🔄 Underwater Hot Swap — No Board-Out-of-Water Required
The T-handle and magnetic switch allow full battery replacement while the surfboard remains in the water. For rental operations running back-to-back sessions, eliminating the lift-dry-swap cycle translates directly to throughput. A fleet of 10 boards running 4 swaps per day saves approximately 3 hours of handling time daily compared to conventional battery designs.
🧠 6-Point BMS Protection — Japanese IC Chipset
Integrated BMS covers: over-charge (84.0V cutoff), over-discharge (60.0V cutoff), overcurrent (220A threshold), over-temperature (65°C shutoff), short-circuit (microsecond response), and active cell balancing. Hardware-level protection operates independently — no app, no Bluetooth dependency, no single point of failure in the protection chain.
🔋 26650 NCM Cells — 800 Cycles at 80% DOD
The 26650 cylindrical format delivers higher capacity per cell than 18650 at equivalent discharge rates, which matters in a fixed-volume marine enclosure. Rated at ≥800 cycles before capacity drops below 80% of nominal under IEC 61960 conditions. The 58Ah variant achieves 4,176Wh in the same footprint through additional parallel cell groups — not a larger enclosure.
🏭 OEM/ODM — 8 Fully Configurable Parameters
Submit a spec sheet and we configure: nominal voltage (24V–96V), capacity (10Ah–200Ah+), continuous discharge current, enclosure dimensions, waterproof grade (IP65/IP67/IP68), connector type (XT90, Anderson, custom pin), BMS communication protocol (UART, CAN, RS485), and branding. Engineering review: 48 hours. Sample turnaround: 5–7 business days. Production MOQ: 10 units.
Emballage et livraison
Emballage sécurisé et conforme
Pour garantir le transport en toute sécurité des marchandises dangereuses de classe 9, chaque batterie est protégée par Laine de perle de haute qualité (mousse EPE) et enfermé dans Cartons certifiés ONU. Pour les envois en vrac, nous utilisons des emballages robustes. Palettes en contreplaqué ou en plastique Emballé sous film rétractable, entièrement conforme aux réglementations internationales en matière d'expédition.
Options d'expédition internationale (Incoterms)
Nous proposons des conditions d'expédition flexibles pour répondre aux besoins de votre entreprise, notamment : FOB, CIF et DDP (Porte à porte, taxes comprises).
- Par mer : Le choix le plus économique pour les commandes en gros.
- Par avion / express : Livraison rapide des échantillons (DHL/UPS/FedEx).
- Par voie ferrée : Service CR Express fiable pour les marchés européens et d'Asie centrale.
Délai de production
Nos délais de livraison varient en fonction de la personnalisation du produit :
| Type de produit | Échantillons | commande groupée |
|---|---|---|
| Modèles standard | 5 à 7 jours | 14 à 20 jours |
| Modèles personnalisés | 7 à 14 jours | 14 à 28 jours |
Normes de sécurité mondiales et conformité des équipementiers
Lors de l'intégration d'une batterie lithium personnalisée à votre appareil, la conformité réglementaire est impérative. Chez Balder Power, nos solutions de batteries OEM sont conçues dès le départ pour réussir les tests de sécurité internationaux les plus rigoureux. Nous garantissons la conformité de vos batteries aux normes de performance CE, UL et IEC, et fournissons les rapports UN38.3 et les fiches de données de sécurité (FDS) obligatoires pour une expédition internationale simplifiée. Du prototypage initial à la certification finale, nous levons les obstacles à la conformité afin d'accélérer la mise sur le marché de votre produit.
